Originally Posted by Ultra Nolanite
How would they get the Tesseract anyway ? Don't think Odin is losing that baby out of his sight any time soon. Better to have Cap knock some sense into him.
In the comics, the original Cosmic Cube (aka Tesseract) was created by AIM's scientists and used by the Red Skull in his various schemes. Hawkeye recruited a group of rogue scientists to work on the Tesseract in The Avengers, and they could well have been members of AIM. (HYDRA is a less likely possibility because the group Clint and Selvig were working with were from a variety of ethnicities, which would be anathema to the Nazi affiliated villains.)
With that background in mind, it would make perfect sense if AIM succeeded in creating (or recreating) the Tesseract in CA: TWS.